Most foundations are not structured to spend down their funds over a given period of time.

大多数基金会的结构都不是在一段时间内花掉他们的资金。

So over a given period of time, the same amount of rain will hit you from the top, regardless of how fast you're going.

综上所述，在给定时间内，你头顶上淋的雨总是等量的，不管你跑得多快。

Meanwhile, we can think of incidence as the number of new cases over a given period of time, or the rate at which new cases appear.

与此同时，我们可以把发病率理解为一段时间内新病例的数量，或者新病例出现的速度。

Certain types of insurance, called " term insurance" , are merely for your protection over a given period of time and do not build up reserves.

某些类型的保险， 称为“定期保险” ，仅在给定时间段内为您提供保护， 不会积累储备金。